This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A215441 #13 Sep 08 2022 08:46:03 %S A215441 0,1,7,39,97,115,199,1287,1411,2713,4647,84985 %N A215441 Numbers k such that 3^k + k^3 + 1 is prime. %C A215441 a(13) > 2*10^5. - _Robert Price_, Mar 06 2014 %t A215441 Select[Range[0, 5000], PrimeQ[3^# + #^3 + 1] & ] %o A215441 (Magma) [n: n in [0..800] | IsPrime(3^n+n^3+1)]; %o A215441 (PARI) is(n)=isprime(3^n+n^3+1) \\ _Charles R Greathouse IV_, Mar 06 2014 %Y A215441 Cf. A215436. %K A215441 nonn %O A215441 1,3 %A A215441 _Vincenzo Librandi_, Sep 03 2012 %E A215441 a(12) from _Robert Price_, Mar 06 2014